Transmission system switch



T. PANZERBIETER a AL Aug. 2, 1932. TRANSMISSION syszrsu swn'cn Re, 18,553

Original Filed May 8. 1925 INVENTORS. 77Ieodar Panzerb/vfer &

Il I/ /Ie/m ll ayel AT T oRNEY Reiuued Aug. 2, 1932 UNITED STATES PATENT OFFICE BERLIN, GERMANY, ASSIGNORS TO WESTINGHOUSE ELECTRIC & manurao'rnamo COMPANY, OF NEW YORK, N. Y., A CORPORATION TRANSMISSION SYSTEM SWITCH Original No. 1,718,251, dated June 25, 1929, Serial No. 28,816, filed Kay 8, 1925, and in Germany April 7, 1924. Application for reissue filed September 11, 1929. Serial No. 391,964.

Our invention relates to improvements in transmission-system switches of that type in which the switch blades are supported by an switch then becomes diflicult, if not altogether I 1m ossible.

ur invention consists of an improved arrangement and construction of such switches in which the blade is loosened in the contacts prior to the switch being opened so that the openin of the switch is greatly facilitated. Accor mg to our invention, the switch blade is made movable in relation to the rotatable insulator.

In the drawing aflixed to our specification and forming part'thereof Figures 1 and 2 are plan views of a switch embodying our invention;

Fig. 3 is a view in elevation of the switch structure of Figs. 1 and 2.

In the constructions illustrated in the figures the brid ing member comprises two blades each 0% which is eccentrically fulcrumed upon the rotary insulator 2' At the commencement of the opening motion or the switch the fulcrum 2 for instance, in Fig. 1 moves in a circle and causes angular movement of the blade m and thereby cracks the ice. When the blade m has reached the position indicated in broken lines, its end comes in contact with the stop a and subsequently the blade is forced out of the stationary contact is A similar process takes place with the blade m at the stationary contact 70 In the arrangement illustrated in Fi 4 the fulcrum pins 2 and 2 are located si eways from the connecting line of the two stationary contacts 10 and 12 On turning the rotary insulator i clockwise for the purpose of opening the switch the blades m and m are loosened in their stationary contacts K and K, by a movement in the direction of their longitudinal axis and only after this has happened do the stops a and (1 come in contact with and carry the blades m and 1m along in an'arc around the axis of rotation of the insulator to completel open the circuit. In the arrangement of both Figs. 1 and '2, to secure the position of the switch blade in the opened state upon the rotary insulator i a spring S is arranged upon the latter which forces the switch blade against a stop upon the insulator by means of which stop the blade is forced into the stationary contacts K and K when the switch is closed again. These stops are shown in the figures indicated by the reference letter a,.

Accordingly, throughout the movement to ,7 closed position, the switch blades occupy the positions relative to each other which are indicated by the full lines in Figs. 1 and 2, thus acting in closing like ordinary rigid switch blades of the prior art.' The move ments to the positions indicated by dotted lines are merely efi'ected to break ice-seals when it is desired to open the switch.

It will be understood that the details of construction may be modified within the ambit of the claims without departing from the spirit of our invention.

We claim as our invention:

1. In a switch, a rotary insulator and stationary insulators spaced from said rotary insulator, contacts on said stationary insulators, bridging means comprising blade members each eccentrically pivoted upon said rotary insulator, stop means upon said rotary insulator adapted to force the blade members into engagement with said contacts when closing said switch, and spring means adapted to force said blade members against said stop means when said switch is open.

2. In a switch for transmission lines of the type in which the contact bridging member is mounted on a rotary insulator located between the two stationary insulators supporting the lines, a bridging member divided into two sections, each of said sections being eccentrically mounted upon said rotary insulator.

3. In a switch structure, the combination with an axially rotatable insulator located between two stationary insulators provided with contact members, of a pair of switch blades for engaging said contact members pivoted eccentrically upon said rotatable insulator.

4. In a switch structure, the combination with an axially rotatable insulator located between two i stationary insulators provided with contact members, of a pair of switch blades for engaging said contact members pivotedeccentrically upon said rotatable insulatorso that said blades move substantial- 1y longitudinally in relation to the said ro-' tatable insulator when initially rotated to open position and thereafter to'revolve with the insulator.

5. In a switch structure," the combination with an axially rotatable insulator located between two stationary insulators provided with contact members, of a pair of switch blades for engaging said contact members pivoted eccentrically upon said rotatable insulator, stops upon said rotatable insulators adapted'to force said blades into said contact members during the-closing operation and V a means adapted to force said blades against said stops after said blades have separated from said contact members.

6. In a switch structure, the combination with an axially rotatable insulator located between two stationary insulators provided with contact members, of a "'r of switch blades itioned substantial y' in' line with each ot er on said rotatable insulator, and means for shortening the over-all length of said pair of blades and for rotating said blades ug on the rotation of said insulator. HEODOR PANZERBIETER.

WILHELM NAGEL. 

